I checked the stator output on a friends Rude 150 and he has 20VAC at idle and up to 50VAC at a few thousand RPM. I have about 10VAC to 13VAC which I figured was way to low but I didn't check that after the resistance check.
There is no output test for the stator alone, just resistance and shorts to ground. The output test for the charging system is about 6 amps at idle, 25 amps at 1000, and 35+ amps above 2800rpm.